Chair frame



FIG. 1 is a front perspective view of a chair frame showing the new design;

FIG. 2 is a slightly reduced front view of the chair frame of FIG. 1;

FIG. 3 is a slightly reduced is a back view of the chair frame of FIG. 1;

FIG. 4 is a slightly reduced left side view thereof;

FIG. 5 is a slightly reduced right side view thereof;

FIG. 6 is a slightly reduced bottom plan view thereof; and,

FIG. 7 is a slightly reduced top plan view thereof.

The broken lines shown are for environmental illustrative purposes only, and form no part of the claimed design. 

We claim the ornamental design for a chair frame, as shown and described. 